.app{
	width: 100%;
	height: 100vh;
	background-color: #ffffff;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.btn81{
	--hover-text: 'HOVER';
	--b-color: #7ead63;
	padding: 0 32px;
	height: 56px;
	font-size: 18px;
	letter-spacing: 2px;
	color: var(--b-color);
	font-weight: bold;
	position: relative;
	background-color: transparent;
	border: 1px solid var(--b-color);
	outline: none;
	border-radius: 7px;
	cursor: pointer;
	overflow: hidden;
}
.btn81:before{
	content: '';
	width: 0;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
	background-color: var(--b-color);
	transition: width 0.3s ease-in-out;
	z-index: 1;
	cursor: pointer;
}
.btn81:hover:before{
	width: 100%;
}
.btn81:after{
	content: var(--hover-text);
	width: 0;
	color: #ffffff;
	z-index: 10;
	position: absolute;
	left: 32px;
	transition: width 0.3s steps(5,end);
	overflow: hidden;
	box-sizing: border-box;
	z-index: 2;
	cursor: pointer;
}
.btn81:hover:after{
	width: calc( 100% - 64px);
	transition-delay: 0.4s;
}
.btn81:active{
	transform: scale(0.98);
}